Hangs up Ubuntu. At the same time on the screen as a freeze-frame. The sound disappears after 5 seconds. The image remains until I click Reset

Nov 5 15:54:12 victor-OptiPlex-790 kernel: [24884.238009] nouveau 0000:01:00.0: fifo: SCHED_ERROR 0a [CTXSW_TIMEOUT] Nov 5 15:54:12 victor-OptiPlex-790 kernel: [24884.238027] nouveau 0000:01:00.0: fifo: runlist 0: scheduled for recovery Nov 5 15:54:12 victor-OptiPlex-790 kernel: [24884.238041] nouveau 0000:01:00.0: fifo: channel 6: killed Nov 5 15:54:12 victor-OptiPlex-790 kernel: [24884.238051] nouveau 0000:01:00.0: fifo: engine 0: scheduled for recovery Nov 5 15:54:12 victor-OptiPlex-790 kernel: [24884.238846] nouveau 0000:01:00.0: chrome[3263]: channel 6 killed!
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    Two options - either chrome is not friendly with nouveau, or just a little memory (I believe in it). - KoVadim

2 answers 2

Error googled? Tried this method ?

It was similar with debian-based distributions, somewhere in June and July of this year. After updating while listening to music / watching movies, the system was hanging tight. Solved the problem by rolling back to an older version. Now I switched to elementary, a similar problem arose in it - I solved it by installing the latest version of NVIDIA proprietary firewood.

    This is a Nouveau video driver error. For details, check out bugs.freedesktop.org , especially: # 93629 , # 99900 and # 100567 (which are related to SCHED_ERROR / CTXSW_TIMEOUT ).

    To debug freeze you can use the Magic SysRq key , for example:

    • Alt - SysRq - 9 - allows you to change the level of detail output.
    • Alt - SysRq - w - will display a list of all uninterrupted tasks.
    • Alt - SysRq - l - Shows the stack trace for all active processors.
    • Alt - SysRq - t - O Lists current tasks and information about them in the current console.
    • Alt - SysRq - p - Print the current registers and flags to the console.
    • Alt - SysRq - q - Show all active high resolution timers and clock sources.
    • Alt - SysRq - m - will display information about available and used RAM.

    Suggested solutions:

    • Update Ubuntu and the kernel to the latest version.
    • If the problem persists, the workaround is to install NVIDIA drivers , which replaces the Nouveau video driver.

    See also: Ubuntu desktop hangs occasionally during regular use .